Hello Peter3605,
Welcome to the Community page,
So to answer your first question Quickbooks desktop is being discontinued as in the whole package is being removed and will not be supported at all, you will not be able to use it come end of January 2023.
So you will not be able to use Quickbooks desktop at all as there will be no access to it come end of January 2023. So you will need to export your data out of it and save it to your pc and move to either Quickbooks online or a different software account.
There will be no third party selling it either im afraid
